Western Australia has reported 13 new local COVID-19 cases and two infections linked to travellers.
Of the locally acquired infections, 10 are linked to an outbreak in the southern Perth suburb of Coolbellup.
This includes eight household contacts and two close contacts.
A household contact from the Safety Bay cluster also tested positive and a person became infected after visiting the Willagee IGA supermarket.
An infection was also found in the Greater Bunbury region, about two hours south of Perth, and remains under investigation.
It is believed this case was infectious in the community and contact tracers are working to identify potential exposure sites.
All 15 cases are now in quarantine and health workers will continue to monitor them.
About 5000 people were tested for COVID-19 on Sunday.
Meanwhile, WA Health is monitoring two vessels off the WA coast after both reported that they were likely to have COVID cases on board.
All positive crew members are isolating in their cabins.
